Effect of reaction parameters on WOx nanostructures by the solvothermal process

Effect of reaction parameters on WOx nanostructures by the solvothermal process

In this work, nanowires and nanorods of WOx have been synthesized by the solvothermal method. The effect of reaction time and acetic acid as solvent were studied. X-ray diffraction (XRD) patterns showed the monoclinic WO2.72, WO2.79, and orthorhombic WO3 crystalline structures. Scanning Electron Mic...

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Autori principali: Olivas Sarabia, Amelia, Cardoza-Contreras, Marlene N, Cota Leal, Marcos Alan, Sepúlveda Guzmán, Selene
Natura: Online
Lingua:eng
Pubblicazione: Universidad Autónoma de Baja California 2021
Accesso online:https://recit.uabc.mx/index.php/revista/article/view/123
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spelling recit-article-1232022-10-26T18:35:59Z Effect of reaction parameters on WOx nanostructures by the solvothermal process Efecto de los parámetros de reacción en nanoestructuras de WOx por el proceso solvotermal Olivas Sarabia, Amelia Cardoza-Contreras, Marlene N Cota Leal, Marcos Alan Sepúlveda Guzmán, Selene Acetic acid WOx nanowires Solvothermal Optical properties Ácido acético Nanocables WOx Solvotermal Propiedades ópticas In this work, nanowires and nanorods of WOx have been synthesized by the solvothermal method. The effect of reaction time and acetic acid as solvent were studied. X-ray diffraction (XRD) patterns showed the monoclinic WO2.72, WO2.79, and orthorhombic WO3 crystalline structures. Scanning Electron Microscopy (SEM) and High-Resolution Transmission Electronic Microscopy (HRTEM) images presented nanostructures such as nanowires and nanorods at different sizes. Band gap energies were supplied by Ultra Violet visible (UV-vis) absorption spectra. The Photoluminescence (PL) spectra exhibited three emission peaks in the blue zone at 440, 460, and 484 nm. X-ray Photoelectron Spectroscopy (XPS) was used to calculate W6+, W5+, and W4+ oxidation states. The results showed that increasing the reaction time from 10 h to 24 h affected the crystalline structure from monoclinic to orthorhombic. Moreover, with the addition of acetic acid as solvent, the crystal structure is not affected but stabilizes the monoclinic phase in the course of time. En este trabajo se han sintetizado nanocables y nanovarillas de WOx por el método solvotermal. Se estudió el efecto del tiempo de reacción y del ácido acético como disolvente. Los patrones de difracción de rayos X (XRD) mostraron las estructuras cristalinas monoclínicas WO2.72, WO2.79 y ortorrómbicas WO3. Las imágenes de microscopía electrónica de barrido (SEM) y microscopía electrónica de transmisión de alta resolución (HRTEM) presentaron nanoestructuras como nanocables y nanobarras de diferentes tamaños. Las energías de banda prohibida fueron suministradas por espectros de absorción ultravioleta visible (UV-vis). Los espectros de fotoluminiscencia (PL) exhibieron tres picos de emisión en la zona azul a 440, 460 y 484 nm. Se utilizó espectroscopía de fotoelectrones de rayos X (XPS) para calcular los estados de oxidación W6 +, W5 + y W4 +. Los resultados mostraron que el aumento del tiempo de reacción de 10 h a 24 h afectaba la estructura cristalina de monoclínica a ortorrómbica. Además, con la adición de ácido acético como disolvente, la estructura cristalina no se ve afectada, pero estabiliza la fase monoclínica con el paso del tiempo. Universidad Autónoma de Baja California 2021-09-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html text/xml https://recit.uabc.mx/index.php/revista/article/view/123 10.37636/recit.v43234244 REVISTA DE CIENCIAS TECNOLÓGICAS; Vol. 4 No. 3 (2021): July-September; 234-244 REVISTA DE CIENCIAS TECNOLÓGICAS; Vol. 4 Núm. 3 (2021): Julio-Septiembre; 234-244 2594-1925 eng https://recit.uabc.mx/index.php/revista/article/view/123/279 https://recit.uabc.mx/index.php/revista/article/view/123/280 https://recit.uabc.mx/index.php/revista/article/view/123/281 Copyright (c) 2021 Dra. Amelia Olivas Sarabia, Marlene N Cardoza-Contreras, Gonzalo Lastra Medina, Selene Sepúlveda Guzmán https://creativecommons.org/licenses/by/4.0
institution RECIT
collection OJS
language eng
format Online
author Olivas Sarabia, Amelia
Cardoza-Contreras, Marlene N
Cota Leal, Marcos Alan
Sepúlveda Guzmán, Selene
spellingShingle Olivas Sarabia, Amelia
Cardoza-Contreras, Marlene N
Cota Leal, Marcos Alan
Sepúlveda Guzmán, Selene
Effect of reaction parameters on WOx nanostructures by the solvothermal process
author_facet Olivas Sarabia, Amelia
Cardoza-Contreras, Marlene N
Cota Leal, Marcos Alan
Sepúlveda Guzmán, Selene
author_sort Olivas Sarabia, Amelia
title Effect of reaction parameters on WOx nanostructures by the solvothermal process
title_short Effect of reaction parameters on WOx nanostructures by the solvothermal process
title_full Effect of reaction parameters on WOx nanostructures by the solvothermal process
title_fullStr Effect of reaction parameters on WOx nanostructures by the solvothermal process
title_full_unstemmed Effect of reaction parameters on WOx nanostructures by the solvothermal process
title_sort effect of reaction parameters on wox nanostructures by the solvothermal process
description In this work, nanowires and nanorods of WOx have been synthesized by the solvothermal method. The effect of reaction time and acetic acid as solvent were studied. X-ray diffraction (XRD) patterns showed the monoclinic WO2.72, WO2.79, and orthorhombic WO3 crystalline structures. Scanning Electron Microscopy (SEM) and High-Resolution Transmission Electronic Microscopy (HRTEM) images presented nanostructures such as nanowires and nanorods at different sizes. Band gap energies were supplied by Ultra Violet visible (UV-vis) absorption spectra. The Photoluminescence (PL) spectra exhibited three emission peaks in the blue zone at 440, 460, and 484 nm. X-ray Photoelectron Spectroscopy (XPS) was used to calculate W6+, W5+, and W4+ oxidation states. The results showed that increasing the reaction time from 10 h to 24 h affected the crystalline structure from monoclinic to orthorhombic. Moreover, with the addition of acetic acid as solvent, the crystal structure is not affected but stabilizes the monoclinic phase in the course of time.
publisher Universidad Autónoma de Baja California
publishDate 2021
url https://recit.uabc.mx/index.php/revista/article/view/123
_version_ 1792095339475369984

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